To vote in MultisigBase a signer submits the same data as the proposal. Then, this data is hashed into a proposal id (topic) which has its votes tracked. When enough votes are cast the proposal passes:
https://github.com/code-423n4/2023-07-axelar/blob/main/contracts/cgp/auth/MultisigBase.sol#L51-L63
However, there is no event emitted for when a vote is cast. This makes it difficult to track voting off-chain, which is important for transparency and for users and signers to know what topics are going on. topics can also only be tracked by their hashed value, hence, emitting this will help users to query on-chain for specific votes.
Add an event for when a vote is cast, containing signer, topic and voteCount.
